Official example configs

[TheRedCyclops]

As a relatively new user I have struggled quite a bit (and I'm still struggling) to configure beets to do exactly what I want.

I think that adding official commented example configs for multiple purposes could help new users in understanding the format and getting started faster.
Some of them could be:

General

• Default: A setup which explicitly denotes the default behavior, this could also be automatically created if no configuration is detected (as many window managers do)
• Automatic: An example setup that is as automated as possible and shows how to run beets periodically
• Manual/Detailed: An example setup where the user is asked to confirm everything and it tries to get the most complete and correct metadata

Integrations

• Jellyfin: A setup made to work best with Jellyfin
• Subsonic: A setup made to work best with Subsonic
• Navidrome: A setup made to work best with Navidrome